Rocker Steven Tyler has assured worried fans his latest health woe had nothing to do with drugs or alcohol, insisting he was completely sober during his shower fall.The Aerosmith frontman was hospitalised in Paraguay on Tuesday (25Oct11) after knocking out his teeth and suffering cuts to his face, but after undergoing dental surgery he made a triumphant return to the stage in Asuncion on Wednesday (26Oct11), blaming the situation on a bout of food poisoning. Opening up about the incident for the first time, Tyler reveals the nasty fall was purely accidental and not the result of drugs or illegal substances, as many may have initially suspected. During a phone interview with U.S. Today show host Matt Lauer on Thursday (27Oct11), he explained, "I got four stitches... Well you know, quite frankly, I just passed out. I was in the shower and I got nauseous and I started to get sick and I just fell on my face... And I woke up with the water running on me, wondering where the hell I was. And the next thing you know, my tour manager was calling the American embassy and we found the best hospital. It was like one-stop shopping. They stitched up my eye, they did a little plastic surgery and they fixed my tooth all in one fellow swoop." And while Tyler admits he understands why followers might question the story due to his past addiction problems, he hasn't fallen off the wagon. He added, "Being in the (recovery) programme that I'm in, it's something that we have to accept. I went public with my problems only to address them straight on. So people thinking that (I was drunk/high) is natural and normal. "We flew last night from Paraguay, after that incident, and... we're in Argentina for two hours (sic). And if anybody knew anybody that used substances, they wouldn't be up the hour after, having a talk with Matt Lauer and the rest of America. But you know, it's nothing that I don't understand, I get that people think that, it still bothers me a little but it's something I'll have to deal with for the rest of my life."